Ink motion



H. A. W. WOOD 2 w1 INK MOTION Filed OGL. 24, 1934 lTED STATES PATENT INKMOTION Henry A. Wise Wood, New York, N. Y., assignor to Wood NewspaperMachinery Corporation, New York, N. Y., a corporation of VirginiaApplication October 24, 1934, Serial No. 749,786

(Cl. 10b-350) Claims.

The principal object of this invention is to provide a practical meanswhereby the ghosting which manifests itself in uneven shades in theprinting can be entirely avoided. This is and serving as a reservoir forthe ink. The fountain roll ll is provided as usual and the regulatingblade l'l is shown. The fountain roll delivers ink to a pick-up rolleri6 which, through 5 done by providing an improved means fortranstransfer roller 9, supplies the ink drum e with 5 fering the ink tothe form rolls from the ink the necessary amount of ink. drum. After thebelt 5 contacts with the plates on the Other objects and advantages ofthe invention cylinder 2 it then contacts with the ink drum 5, willappear hereinafter. which not only imparts a new supply of the ink 10Reference is to be had to the accompanying but also tends to eradicateany pattern on the 1U drawing, in which ink film.

Fig. 1 is an end view of a printing press unit After contacting with theink drum` 6 the belt carrying two ink motions constituting one empassesaround the roller ll and then under the bodiment of this invention, anddistributors 8 and 1 respectively which will Fig. 2 is a similar viewshowing a modification. smooth out any pattern left on the outer surl5One of the difficulties experienced in rotary web printing is the wellknown fact that when ink is transferred from the ink drum through a formroller to the printing plate the plate takes face of the endless belt 5.In this way the reduced thickness of ink in a pattern on the belt iseliminated before it gets back to the plate cylinder.

up a pattern of ink from the form roller, This It will be obvious thatalthough I have shown 20 pattern of reduced thickness of ink on the formtwo distributors l and 8, any desired number roller is seldom eradicatedas the form roller Can be Used t0 properly distribute the ink. passesback in contact with the ink drum and In the OTnl SlTLOWn in Fig. 2 aSimilar a1- tncn with the plate. This is the cause of ghostrangement 0iprinting couples is Shown but ing which produces uneven shades,particularly here, instead 0f having a belt fOI each form 25 in the darkareas of the printing. Attempts have I'Ollell e Single endleSS belt l@iS empleyed Servbeen made to eradicate ghosting, especially by ing inplace 0f tWO` OTIn IOlleiS. This belt longitudinal vibration of the inkdrum. This DeSSeS aTOllnd tWU Cylinders I3 and under and other efforts,however, have proved partially cylinders i9 and 2l and severaldistributors 2E? inadequate and the present invention is designed areemployed, aS Inany aS may be deSied. 30

`to fully eliminate the ghesting and t0 provide These distributors bearagainst the inked suryadditional distribution against the surface offace of the belt I6 and serve to eradicate any the element which,according to this invention, pattern left during previous Contact withthe is provided in place of the form roller. platee- Referring to Fig.1, the usual impression cyl- In both cases the transfer of ink from the35 inders l cooperate with the usual plate cylinders ink drum 6 dieetlyt0 a fOHn IOll in Contact '2 t0 OTm the printing COllples. Ordinarilythe With it and then directly to the plate is avoided plate cylindersare supplied with ink by form by the interposition of the flexible belt5 or it. rolls which contact with the ink drum but, ac- This belt is ofa much greater length than the 40 cording to this invention, the formrolls are discircumference of the cylinder 3 or le. These 40 placed by adifferent means for transferring ink belts may be made of any strongflexible main the form of an endless belt 5 which contacts terialsuitable for inking purposes. with the printing spaces carried on theplate cyl- Having thus described my invention and the inder 2 and withthe ink drum 6. In this form advantages thereof, I do not wish to belimited of the invention, one of these belts 5 is substito the detailsherein disclosed, otherwise than 45 tuted for each one of the formrollers and it is as set forth in the claims, but what I claim carriedby two cylinders 3 and 4, the former of iszwhich supports it firmlyagainst the printing l. In an inking mechanism, the combination plateson the cylinder 2. Preferably the cylinder of an ink drum and means fortransferring d is spaced from the ink drum 6 and the belt 5' the inktherefrom to the printing plates and 50 has a free space between thetwo. Also on the back to the ink drum at a different point on back thereare distributor rolls 'l and 8 of well the ink drum from that from whichit was known construction and function. taken, with means forredistributing the ink on Of course, the ink' is distributed from afounsaid means. tain lll located in a cavity in the base plate l5 2. Ina mechanism for inking the plates on 55 a plate cylinder, thecombination with an ink drum and means for supplying ink thereto, of acylinder spaced from the ink drum, an endless belt passing over the lastnamed cylinder into contact with the plates on the plate cylinder, acylinder inside the endless belt for holding it against the ink drum,and distributing rollers engaging the belt on the side opposite the inkdrum and between the two cylinders inside the belt, for the purposedescribed.

3. In an ink distributing system, the combination with an ink drum, andmeans for supplying ink thereto, of two endless belts engaging theopposite sides of the ink drum, means for supporting said belts andpressing them against the surface to be inked and means for distributingthe ink on the surface ef each belt.

4. In an ink distributing mechanism, the combination with a cylinder anda pair of cylinders located on opposite sides thereof and out of contacttherewith, of an endless belt passing over each cylinder and around thefirst cylinder, said cylinders serving to press the belt against asurface to be inked and a cylinder adjacent to the first cylinder forguiding the belt.

5. In an ink distributing mechanism, the combination with a centralcylinder and a pair of cylinders located on opposite sides thereof andout of contact therewith, of an endless belt passing over said cylindersand around the central cylinder, said side cylinders serving to pressthe belt against a surface to be inked, a cylinder adjacent to thecentral cylinder for guiding the belt, means for distributing ink tosaid belt against the last named cylinder, and means on the inking sideof said belt and located 0n cpposite sides of the belt structure fordistributing the ink on the belt between the two first named cylindersand the last named cylinder.

HENRY A. WISE WOOD.

